Of course I bought the "Chuan" brand caliper produced by Chengdu Measuring Tools and Cutting Tools Factory (abbreviation: Chengliang). The amount is the standard drafting unit for vernier calipers. A first-tier brand among the first-tier brands of domestic calipers. Our organization, regardless of whether it is an individual or a public company, only buys calipers in large quantities. 1000mm is estimated to cost about 2,000 yuan.